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Posted to common-dev@hadoop.apache.org by "Hairong Kuang (JIRA)" <ji...@apache.org> on 2007/03/21 22:31:32 UTC
[jira] Updated: (HADOOP-1136) exception in
UnderReplicatedBlocks:add when ther are more replicas of a block than
required
[ https://issues.apache.org/jira/browse/HADOOP-1136?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hairong Kuang updated HADOOP-1136:
----------------------------------
Attachment: neededReplicationAdd.patch
Dhruba, could you please check if this patch gets rid of the exception? Thanks.
> exception in UnderReplicatedBlocks:add when ther are more replicas of a block than required
> -------------------------------------------------------------------------------------------
>
> Key: HADOOP-1136
> URL: https://issues.apache.org/jira/browse/HADOOP-1136
> Project: Hadoop
> Issue Type: Bug
> Reporter: dhruba borthakur
> Assigned To: Hairong Kuang
> Attachments: neededReplicationAdd.patch
>
>
> I was running a random writer followed by a sort when I saw this condition:
> Exception in thread "org.apache.hadoop.dfs.FSNamesystem$ReplicationMonitor@187814" java.lang.ArrayIndexOutOfBoundsException: 3
> at org.apache.hadoop.dfs.FSNamesystem$UnderReplicatedBlocks.add(FSNamesystem.java:447)
> at org.apache.hadoop.dfs.FSNamesystem$UnderReplicatedBlocks.add(FSNamesystem.java:464)
> at org.apache.hadoop.dfs.FSNamesystem.processPendingReplications(FSNamesystem.java:1891)
> at org.apache.hadoop.dfs.FSNamesystem$ReplicationMonitor.run(FSNamesystem.java:1795)
> at java.lang.Thread.run(Thread.java:619)
> processPendingReplications is invoking neededReplications.add(). The add method then invokes add(block, 3, 4). This add method calls getPriority and that returns 3. Now, the call to priorityQueues[3].add() throws an OutOfBoundsException.
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